A security alarm is a system designed to detect and alert when an unauthorized entry or activity occurs in a protected area. It typically consists of sensors, control panels, and alarms that work together to monitor and protect against intrusion, fire, and other emergencies.
Security alarms play a crucial role in safeguarding homes, businesses, and public spaces. They deter crime, provide early warning of potential threats, and can help mitigate risks. Historically, security alarms have evolved from simple door and window contacts to sophisticated systems that incorporate advanced technologies such as motion sensors, surveillance cameras, and remote monitoring.